The question on height was: ’What is your height?’ The question on weight was: ‘What is your weight, measured when wearing light clothing?’ The actual calculation of BMI is weight divided by height squared. Body mass index is the most commonly used method of determining the degree of obesity. Body mass index = 30 kg/m² is the internationally approved limit for obesity.
The postal survey Health Behaviour and Health among the Finnish Adult Population (AVTK) was conducted yearly from 1978 to 2014 (www.thl.fi/avtk).
The Regional Health and Welfare Study (ATH) yearly since 2012. (www.thl.fi/ath)